Published in American Fern Journal, in 1950, in volume 40, pages 16-21

Published in American Fern Journal, in 1950, in volume 40, pages 21-32

Published in American Fern Journal, in 1950, in volume 40, pages 32-41

Published in American Fern Journal, in 1950, in volume 40, pages 69-74

Published in American Fern Journal, in 1950, in volume 40, pages 213-225

Published in American Fern Journal, in 1950, in volume 40, issue 1, pages 118

Published in American Fern Journal, in 1950, in volume 40, issue 1, pages 132

Published in American Fern Journal, in 1950, in volume 40, issue 2, pages 174

Published in American Fern Journal, in 1950, in volume 40, issue 2, pages 178

Published in American Fern Journal, in 1950, in volume 40, issue 3, pages 201

Published in American Fern Journal, in 1950, in volume 40, issue 3, pages 226

Published in American Fern Journal, in 1950, in volume 40, issue 4, pages 241